Air seal structure suitable for axial flow fan and air seal adjusting tool

Abstract

The utility model discloses an air seal structure suitable for an axial flow fan and an air seal adjusting tool, relates to the technical field of axial flow fans, and aims to solve the problems that the installation process is complicated and the dynamic balance effect of the fan can be influenced when an existing installation rear disc is used for calibrating the center of an air seal on a bearing box and ensuring the working clearance of the air seal. The air seal carbon structure rings are installed on the outer side of the outer wall of the bearing box body baffle, the multiple air seal carbon structure rings are arranged, second installation holes are formed in the multiple air seal carbon structure rings, external bolts are installed in the second installation holes, and the air seal carbon structure rings and the bearing box body baffle are fixed.

Description

Technical Field

[0001] This utility model relates to the field of axial flow fan technology, specifically to an air seal structure and air seal adjustment tooling suitable for axial flow fans. Background Technology

[0002] Axial flow fans are widely used; they are a type of fan where the airflow direction is the same as the fan blade axis, such as electric fans and air conditioner outdoor unit fans. They are called "axial flow" because the gas flows parallel to the fan axis. Axial flow fans are typically used in applications requiring high flow rates but low pressure. An axial flow fan is fixed in position and moves air.

[0003] For example, the Chinese authorized patent (CN214101050U) entitled "(A Double-Sealing Structure for an Axial Flow Fan Motor)" includes: a motor shaft and a motor housing. A front end cover is fixedly mounted on the motor housing. A shaft hole is located at the center of the front end cover, through which the motor shaft passes. An annular groove 1 and an annular groove 2 are coaxially arranged within the shaft hole. An outer sealing ring is located in an annular groove 1, and an inner sealing ring is located in an annular groove 2. Both the outer and inner sealing rings are fitted onto the motor shaft. A water-proof shell is also fitted onto the end of the front end cover near the outer sealing ring. A protective grille is provided at the opening of the water-proof shell. A water-absorbing sleeve is filled inside the protective grille and the water-proof shell. A humidity sensor is located inside the water-absorbing sleeve and is connected to a controller. By setting up structures such as the outer sealing ring, the problem of poor motor sealing effect can be solved, extending the service life of the motor.

[0004] However, the enlargement of the existing air seal working clearance leads to problems such as oil leakage and corrosion in the bearing housing. The original air seal is large in size and has high precision requirements. During air seal installation, the fan needs to be disassembled, and only the rear plate needs to be installed on the bearing housing for air seal center calibration to ensure the air seal working clearance. The installation process is complicated and will affect the fan's dynamic balance. Therefore, it does not meet the current requirements. In response, we have proposed an air seal structure and air seal adjustment tooling suitable for axial flow fans. Utility Model Content

[0005] The purpose of this invention is to provide an air seal structure and air seal adjustment fixture suitable for axial flow fans, so as to solve the problems mentioned in the background art, such as the complex installation process of calibrating the air seal center on the bearing box after installation to ensure the working gap of the air seal, which also affects the dynamic balance of the fan.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an air seal structure suitable for axial flow fans, comprising: an axial flow fan body, wherein a bearing housing baffle is provided at the center position inside the axial flow fan body;

[0007] Also includes:

[0008] A carbon gas seal ring is installed around the outer side of the outer wall of the bearing housing baffle. Several carbon gas seal rings are provided, and each of the several carbon gas seal rings has a second mounting hole inside. An external bolt is installed in the second mounting hole and fixed to the bearing housing baffle.

[0009] Preferably, a fan blade is provided between the axial flow fan body and the bearing housing baffle, and a plurality of fan blades are provided, with both ends of the plurality of fan blades being welded to the axial flow fan body and the bearing housing baffle, respectively.

[0010] Preferably, the bearing housing baffle has an inner cavity, and the inner end of the bearing housing baffle has a first mounting hole, and there are several first mounting holes, all of which are integrally formed with the bearing housing baffle.

[0011] An air seal adjustment fixture suitable for axial flow fans includes a central shaft, which is installed inside an inner cavity. A central adjustment rod is provided above and below the outer wall of the central shaft, and two sets of central adjustment rods are provided.

[0012] Also includes:

[0013] A measuring shaft is mounted above the central shaft, which is fixedly connected to the measuring shaft via a first connector. A connecting rod is provided at the front end of the measuring shaft, and a measuring head is provided at the lower end of the connecting rod.

[0014] Preferably, the upper end face of the connecting rod is fixedly connected to the measuring shaft via a second connector, and the measuring head is fixedly connected to the lower end face of the connecting rod via a third connector.

[0015] Preferably, the two sets of central adjusting rods are internally provided with connecting shafts at both ends, one end of the two sets of connecting shafts is rotatably connected to the central shaft, and the other end of the two sets of connecting shafts is fixed to the first mounting hole bolt.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model, by setting a central adjusting rod, connecting shaft, measuring shaft, first connecting piece, connecting rod, second connecting piece, measuring head, and third connecting piece on the inner cavity of the axial flow fan body, and installing the connecting shaft at the other end of the central adjusting rod in the first mounting hole, allows the central shaft to be installed at the center position of the inner cavity. After the position of the air seal carbon structure ring is adjusted, the measuring shaft is manually rotated, allowing the central shaft to rotate within the connecting shaft at one end of the central adjusting rod. Finally, the measuring head measures the adjusted position of the air seal carbon structure ring to perform a one-turn air seal center calibration test. This simplifies the center calibration test and avoids the problems of the existing installation method where the air seal center calibration is performed on the bearing box after installation, ensuring the air seal working clearance, which is complicated and affects the fan's dynamic balance.

[0018] 2. By setting a gas-sealing carbon structure ring around the outer side of the bearing housing baffle, the sealing performance between its components can be effectively enhanced. Attached Figure Description

[0019] Figure 1 This is a first-view structural schematic diagram of the axial flow fan body of this utility model.

[0020] Figure 2 This is a second-view structural diagram of the axial flow fan body of this utility model;

[0021] Figure 3 This is a partial structural diagram of the central axis of this utility model;

[0022] In the diagram: 100, Axial flow fan body; 101, Bearing housing baffle; 10101, First mounting hole; 10102, Inner cavity; 102, Fan blade; 200, Air seal carbon structure ring; 201, Second mounting hole; 300, Central shaft; 301, Central adjusting rod; 30101, Connecting shaft; 302, Measuring shaft; 303, First connecting piece; 304, Connecting rod; 305, Second connecting piece; 306, Measuring head; 307, Third connecting piece. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example 1

[0025] Please see Figure 1-3 An embodiment of this utility model is provided: an air seal structure suitable for axial flow fans, including: an axial flow fan body 100, and a bearing housing baffle 101 provided at the center of the axial flow fan body 100;

[0026] Also includes:

[0027] A carbon gas seal ring 200 is installed around the outer side of the outer wall of the bearing housing baffle 101. Several carbon gas seal rings 200 are provided. Each carbon gas seal ring 200 has a second mounting hole 201 inside. An external bolt is installed in the second mounting hole 201 and fixed to the bearing housing baffle 101.

[0028] By using the set air-sealing carbon structure ring 200, the gaps between components can be effectively sealed through gap sealing.

[0029] Example 2

[0030] Please see Figure 1 and Figure 2 A fan blade 102 is provided between the axial flow fan body 100 and the bearing housing baffle 101, and a plurality of fan blades 102 are provided. The two ends of the plurality of fan blades 102 are respectively welded to the axial flow fan body 100 and the bearing housing baffle 101. The bearing housing baffle 101 has an inner cavity 10102. The inner end of the bearing housing baffle 101 has a first mounting hole 10101, and a plurality of first mounting holes 10101 are provided. The plurality of first mounting holes 10101 are all integrally formed with the bearing housing baffle 101.

[0031] The first mounting hole 10101 can effectively provide a mounting position base for the connecting shaft 30101 on the central adjusting rod 301.

[0032] Example 3

[0033] Please see Figure 1-3 An embodiment of this utility model provides an air seal adjustment fixture suitable for axial flow fans, comprising: a central shaft 300, the central shaft 300 being installed inside the inner cavity 10102, and two sets of central adjustment rods 301 being provided above and below the outer wall of the central shaft 300.

[0034] Also includes:

[0035] The measuring shaft 302 is installed above the central shaft 300. The central shaft 300 is fixedly connected to the measuring shaft 302 through the first connector 303. The front end of the measuring shaft 302 is provided with a connecting rod 304, and the lower end face of the connecting rod 304 is provided with a measuring head 306.

[0036] Please see Figure 3The upper end face of the connecting rod 304 is fixedly connected to the measuring shaft 302 through the second connecting piece 305, and the measuring head 306 is fixedly connected to the lower end face of the connecting rod 304 through the third connecting piece 307. The two sets of center adjusting rods 301 have connecting shafts 30101 inside at both ends. One end of the two sets of connecting shafts 30101 is rotatably connected to the center shaft 300, and the other end of the two sets of connecting shafts 30101 is bolted to the first mounting hole 10101.

[0037] By installing the connecting shaft 30101 at the other end of the center adjusting rod 301 into the first mounting hole 10101, the center shaft 300 can be installed at the center position of the inner cavity 10102. After the position of the gas seal carbon structure ring 200 is adjusted, the measuring shaft 302 is manually rotated, so that the set center shaft 300 can rotate with it inside the connecting shaft 30101 at one end of the center adjusting rod 301. Finally, the measuring head 306 measures the adjusted position of the gas seal carbon structure ring 200 to perform a one-turn gas seal center calibration test.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An air seal structure suitable for axial flow fans, including an axial flow fan body (100), wherein a bearing housing baffle (101) is provided at the center of the axial flow fan body (100); Its features are: Also includes: A carbon gas seal ring (200) is installed on the outer side of the outer wall of the bearing housing baffle (101). Several carbon gas seal rings (200) are provided. Each of the several carbon gas seal rings (200) has a second mounting hole (201) inside. The second mounting hole (201) is fitted with an external bolt and fixed to the bearing housing baffle (101).

2. The air seal structure for axial flow fans according to claim 1, characterized in that: A fan blade (102) is provided between the axial flow fan body (100) and the bearing housing baffle (101), and there are several fan blades (102). The two ends of the several fan blades (102) are respectively welded to the axial flow fan body (100) and the bearing housing baffle (101).

3. The air seal structure for axial flow fans according to claim 1, characterized in that: The bearing housing baffle (101) has an inner cavity (10102) inside. The inner end of the bearing housing baffle (101) has a first mounting hole (10101) inside. There are several first mounting holes (10101), and all of the several first mounting holes (10101) are integrally formed with the bearing housing baffle (101).

4. An air seal adjustment fixture suitable for axial flow fans, including a central shaft (300), the central shaft (300) is installed inside the inner cavity (10102), and a central adjustment rod (301) is provided above and below the outer wall of the central shaft (300), and two sets of central adjustment rods (301) are provided; Its features are: Also includes: A measuring shaft (302) is installed above the central shaft (300). The central shaft (300) is fixedly connected to the measuring shaft (302) via a first connector (303). A connecting rod (304) is provided at the front end of the measuring shaft (302), and a measuring head (306) is provided on the lower end face of the connecting rod (304).

5. The air seal adjustment fixture for axial flow fans according to claim 4, characterized in that: The upper end face of the connecting rod (304) is fixedly connected to the measuring shaft (302) through the second connector (305), and the measuring head (306) is fixedly connected to the lower end face of the connecting rod (304) through the third connector (307).

6. The air seal adjustment fixture for axial flow fans according to claim 4, characterized in that: The two sets of central adjusting rods (301) are provided with connecting shafts (30101) at both ends. One end of the two sets of connecting shafts (30101) is rotatably connected to the central shaft (300), and the other end of the two sets of connecting shafts (30101) is bolted to the first mounting hole (10101).

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